At a glance — how these 3 alternatives compare
Our read on each project's adoption, maintenance activity and commercial-use risk, derived from GitHub signals and SPDX license terms rather than star count alone. Sorted by stars. How we score.
| Project | Adoption | Maintenance | Commercial use |
|---|---|---|---|
| ★ 40,839 · TypeScript | Flagship | Active | High risk Non-OSI terms restrict commercial or hosted use — read first |
| ★ 29,017 · Vue AGPL-3.0 | Mainstream | Active | High risk Even a hosted/modified deployment can trigger source release |
| ★ 19,073 · PHP MIT | Mainstream | Active | Low risk Embed in a proprietary product with no copyleft obligation |
† Licenses marked † were read from the repository's LICENSE file on 2026-09-05 (linked, pinned to the commit we read) because the GitHub API returned no SPDX id for them. Unmarked licenses are the GitHub API's SPDX classification.
The alternatives
The fastest knowledge base for growing teams. Beautiful, realtime collaborative, feature packed, and markdown compatible.
outline/outline Updated 2026-10-08 wiki
Wiki.js | Next Generation Open Source Wiki
requarks/wiki Updated 2026-10-08 BookStack
NOW MANAGED ON CODEBERG
BookStackApp/BookStack Updated 2026-10-08 Editor's take
Yusuke Morinaga · last revisited · star counts quoted in the text (≈) are as of that date; the cards above are refreshed daily
The Confluence escape is really a fork in the road — "wiki for a team" or "wiki as a knowledge product".
The thing that traps people leaving Confluence is that they shop for “a Confluence clone” when what they actually need is to decide which half of Confluence they were using. Confluence is two products glued together: a free-form team scratchpad (meeting notes, runbooks, half-finished specs) and a structured, permissioned knowledge base. The open-source projects above split cleanly along that seam, and picking the wrong half is how people end up unhappy three months in.
Outline — pick this if your team treats the wiki as a living scratchpad
Outline is the one I would default to for a working team. ≈40.5k★, and its card shows recent pushes, which for a wiki matters more than it does for most categories — a stale wiki engine means stale editor behaviour, and editor bugs are the fastest way to make a team abandon a knowledge tool. The editor is the closest in feel to the modern Confluence editor, which lowers the retraining cost. One caveat: the GitHub API returns no SPDX id for Outline, so the card shows the licence we read in the repository — BUSL-1.1 (Business Source License), which is not a classic open-source license — it converts to Apache after a delay and restricts hosting it as a competing commercial service (its Additional Use Grant excludes running it as a document service). For internal team use this is irrelevant; if your plan was to resell a hosted Outline, read the actual LICENSE file first.
Wiki.js — the middle ground, with an AGPL string attached
Wiki.js (≈28.8k★, Vue, AGPL-3.0) sits between Outline’s scratchpad feel and BookStack’s rigid structure. Markdown-first, Git-backed storage as an option, which is genuinely nice if you want your wiki’s source of truth to be a repo you already back up. The AGPL-3.0 license is the one to actually think about here: if you are running Wiki.js as an internal company wiki, AGPL never triggers. The clause only bites if you modify Wiki.js and then expose the modified version to third parties over a network — which is not what an internal documentation site does. So for the Confluence-replacement use case, treat AGPL as a non-event.
BookStack — pick this when the structure was the point
BookStack (≈19k★, PHP, MIT) is the opposite philosophy from Outline. Where Outline lets a page be anything, BookStack forces a Books → Chapters → Pages hierarchy. If the reason you used Confluence was its space-and-page permission tree and you found Notion-style “everything is a flat document” chaotic, BookStack is the project that will feel right rather than constraining. The MIT license is the most permissive of this group. One real operational note from the GitHub card: BookStack’s primary description now says “NOW MANAGED ON CODEBERG” — the project moved its canonical home off GitHub. The code is the same and very much alive (see the card’s last-push date), but if you want issues and releases, follow it on Codeberg, not the GitHub mirror.
The integration you will miss, and the one you won’t
What none of these replace is the live Jira macro — embedding a real-time issue list inside a page. If your Confluence pages were dense with Jira roadmap and status macros, budget time to either link out to your tracker or rebuild those views; there is no drop-in. What you are unlikely to miss is Confluence’s macro library for decision logs and status badges — those are conventions, not features, and a plain Markdown table in any of these three does the job without the macro tax.
What I would actually do
For a 10–50 person product team that lived in Confluence loosely: Outline. For a team that genuinely used the permission hierarchy and wants Git-backed source: Wiki.js. For a support or ops org documenting fixed procedures where the rigidity is a feature: BookStack.
Comparison notes
For Confluence's core job — team documentation — Outline is the most natural swap, with Markdown editing, team spaces, and an uncluttered interface. BookStack takes a more rigid path, organizing everything into Books, Chapters, and Pages with role-based access, which suits teams that want imposed structure. What you give up is largely the Atlassian and macro tooling: Outline can't embed live Jira issue lists the way Confluence's Jira macro does, and Confluence's template library and page macros (roadmaps, decision logs, status badges) would have to be rebuilt by hand. Permissions are another gap — Confluence's space-level inheritance is finer-grained than most open-source wikis offer.
Migration tips
- Export Confluence spaces as HTML (Space Tools → Content Tools → Export) — the HTML export preserves hierarchy and most formatting
- Confluence's XML export (backup) is more complete but requires custom parsers to import into other tools
- Use the community-maintained confluence-to-outline migration scripts to convert HTML exports to Outline's Markdown format
- Recreate Confluence space permissions and user groups in the target tool — user access models differ significantly
- Audit macros used in your Confluence pages — macros like Jira issue lists, roadmaps, or decision tables require manual recreation
Which alternative should you pick?
Replacing Confluence isn't a single call — it's a trade between license terms, team size, and how much early-stage roughness you can absorb. The 3 projects above split along those lines:
- You want the project with the most GitHub stars in this list → outline. 40,839★ — the most of the 3 projects here. Stars measure attention, not quality or maintenance; check the last-push date and the Editor's take before reading more into it.
- You ship commercial software and need to ship modified code without releasing source → BookStack. MIT licensed — modify and embed without copyleft obligations.
- You want a copyleft project whose modifications must be shared back → wiki. AGPL-3.0 licensed — distributing a modified version (and, under AGPL, offering it over a network) obliges releasing the source, which is what some teams explicitly want.
- You want the project with the most recent push activity → wiki. Last push 2026-10-08 — the freshest activity in this list.
License & commercial-use notes
When replacing Confluence, the license usually decides more than the feature list — whether you can modify it, ship it inside a product, or host it as a service. The 3 projects here fall into:
- Permissive (BookStack) — MIT / Apache / BSD / ISC — modify and embed inside a commercial product with no copyleft obligation. The safest bucket for shipping in a proprietary codebase.
- Network copyleft (wiki) — AGPL / SSPL — the copyleft trigger extends to offering the software over a network, so a hosted deployment of a modified version can oblige you to publish your changes. Read the exact terms before building a paid hosted product on these.
- Source-available (restricted) (outline) — BUSL / Elastic / Polyform / Commons Clause — the source is public but commercial or hosted use is restricted by non-OSI terms. Read the license before any production or commercial use; these are not freely reusable the way an OSI-approved license is.
License fields come from the GitHub API's SPDX classification and can lag a relicense. Where the API returned no SPDX id, the license marked † was read from the repository's LICENSE file on 2026-09-05; the † links to the exact file and commit we read. The repository linked on each card is authoritative — confirm its LICENSE file before any license-sensitive deployment.
Maintenance health of these 3 projects
Of the 3 projects listed, 3 shipped at least one commit in the last 12 months. See how we rank for the full criteria and our self-hosting cost reality check, which apply across every comparison on this site.
Frequently asked questions
How do these 3 alternatives compare on maintenance health?
3 of 3 have shipped a commit in the last 12 months. At least one project here has 5,000+ GitHub stars. Always check the last-pushed date in the cards above and read the latest closed issues — those two signals are the fastest public check we know of.
How this page was compiled
- Repository facts (stars, license, language, last push) come straight from the GitHub public API and are linked on each card as the primary source. Where the API returned no SPDX id, the licence marked † was read from the repository's
LICENSEfile (linked, pinned to the commit we read, with the date checked). - Editorial analysis (the intro, comparison notes and migration tips) is Claude-drafted from Confluence's use case and the alternatives' repository metadata — in Claude Code sessions or scheduled routines run under the operator's account. Samples are spot-checked against the upstream repositories; entries are not individually reviewed unless they carry a signature. See what Claude drafts and what the operator writes.
- Editor's take is signed by Yusuke Morinaga. It was drafted in a Claude Code session the operator ran, then read and confirmed by Yusuke Morinaga before publication, and carries the date it was last revised. It is written from each project's README, LICENSE, release history and issue tracker — not from running the project in production; where that distinction matters, the take says so.
- Maintenance signal: 3 of 3 projects shipped a commit in the last 12 months as of the latest rebuild (most recent activity: ).
- Last editorial review: by Yusuke Morinaga.
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